main()
{
  int i;
  int sum;

  /* test assign */
  sum = 0;
  
  /* test while statement */
  in(i);
  while(i <= 100)
  {
      sum = sum + i;
      i = i + 1;
  }
  out(sum);  /* The result is 5050 */

  /* test if statement */
  if(i == 101)
      out(i);
   else
   {  
      sum = sum + 4;
      out(sum);
   }
}
